Coupling for electrical conduits.



A. C. PROUDFIT.

COUPLING FOR ELECTRICAL CONDUITS.

APPLICATION IILED Nov. 24, 1902.

lflfigfgfin Patented July 14,1914.

ALEXANDER c. rnonnrrr. or PRZNCETGN, new miners" GOUE'LINCT ELECTRICAL COEUJUI'ES.

a, q n sw m E guilty/om).

Application filed Hcvember 2%, nice.

To all HF/0722 1 1 may concern lie it known that I. ALEX-mom C. PROUD- err, a citizen or the United States oi Amer icu. and a resident of Princeton, in the 1 county oi'lvliereer and State of New Jersey,

' in the uccompunying drawings.

This invention has for its object the provision of =1 coupling by which the adjacent ends oi pipes may be coupled in abutting relation. without the necessity for tin-ending the ends of the pipes. an operation which nece situtes undue time and expense when performed on the job. esl'iecinlly in the (use oi electrical conduit for house wiring. to which therefore my invention is especially applicable, although it Will be understood that l contemplate its utilization in any field for which my improvements are available by reason of their nature.

The various features of my invention. will be illustrated and described fully in the accom ninying drawings and specification.

in the drawings, Figure 1 illustrates in vertical longitudinal section a coupling member in the construction of which my invention has been embodied; Fig. 2 a face view of the can] nut; Fig. 3 is a view similar to Fig. l of my improvements as ei'nl'iodied in 2*. coupling for outlet boxes; while Fig. i is a detail view of one of the members shown in Fig. 3; and Fig. is an end view of the same.

In the embodiment of my invention selected for illustration and description as it convenient form to enable ready and com plete ui'iderstanding of my in'ioroveinents, the reference numerals i and 3 designate respectively o. pipe coupling and e medial interior device, shown as integral with the mat ,ria'l of the coupling, taking the form of eshoulder presenting rounded surfaces toward mouth of the coupling, and neting in accordance with my invention, to holdinsulstcd Wires or other contents of the conduit out oi contact with the ends of the conduit pipes which are connected by coupling. The ends of the coupling instead of being threaded, are split into at number of fingers 5, with intervening spaces 6, the ends thereby being rendered compreesible and in accordance with this im- Speeification of Letters Patent.

Serial lilo. 132,597.

portunt feature of my invention. compres sion members are iiirovidml. which they take conveniently t orni of nuts hu ng, interior conipressi means in the shone mun sort Times Z.

which enter the 5. nci-niuilly. int upon rotation. oi the nuts and crowd them engage the lingers it against the pipe ends respectively, cont plei'ing joint. The pipe-ends in corn-- plotting the joint will be held in central posi ti n utter coming into contact with central slnmhler which. positions ti '3 .1 exac ly so as to receive the nimiiniuni action of the fingers .l ig'. I) Hilly be k in i dered to illustrate half a sleeve or coup ing of the kind shown in Fig. 1, but is used to couple n pipe 8 to the zqiertuned wall l) of no. outlet box or similar electrical conduit member, the nperti which may be round. and in order to in electrical connection lx-it'u'een the parts, I have shown the sleeve or coupling device 10 as provided with wedgcdilte webs or shoulde ll, which. when the device is inserted within the aperture engage the Walls thereof untlprefemblv cut somewhat into the meterizil.

lllectricnl connection between an outlet iJOX and the conduit. its. is usually provided to enable the current to find s speedy and good poth to o-round there occurs sort ci knit in tllfi i'il'lbi, preventin" e. destructive result in the box or to the erroundings of the letter. will be obvio i t other nae: is only be used to iicconinli, electrical count-fiction, which i t )L instance illnstro is rniiint: nut 12 has been tightened up upon the sou'it 1.5, so that do not i .iit myself. where mrovision is to be made for such electrical connection, to the so ic struted. in gen erz'si other forth in the cims read in. coi'inection with this specification.

VJhnt l: chii and desire to secure by Letters .lPzi' of" ssid ice "tor electrical CGE1' EFF, at)

. q s. rmmpnsmg a me: having a shank mil;- 3, p'iurahty; s9} 3ar21$33 compress, ble fingers to receive a p gpe, and a 1 said cam-nut to cause compression of said fingers to clamp said pipe; substantially as described.

ALEXANDER C. PROUDFIT. WVitnesses:

' F. A. I"IOPKINS,

ELIZABETH PROUDFIT. 

